User`s Manual of Electromagnetic Flow Meter
Contents
1. User s Manual of Electromagnetic Flow Meter 4t a e 03 BRIEF INTRODUCTION 04 WORKING PRINCIPLES Measuring Principles Converter Circuit Schematic 05 PRODUCT CLASSIFICATION Product Components Product Models 05 TECHNICAL SPECIFICATON 07 DRAWINGS AND DIMENSIONS 08 LECTOTYPE PRINCIPLE 12 CONVERTER OPERATION MENU AND PARAMETER SETUP Keypad and Display L MagB 4 key parameters and setting Details Parameters 22 INSTALLATION 24 WIRING Grounding Converter Terminals and Definition Remote type Wiring Output Signal Wiring 29 SELF DIAGNOSTICS AND TROUBLESHOOTING 30 PACKAGING 30 TRANSPORTATION AND STORAGE 30 OPERATION Brief Introduction 1 1 Features Measurement is not affected by the variation of flow density viscosity temperature pressure and conductivity High accuracy measurement is guaranteed according to the linear measurement principle No obstacle in the pipe no pressure loss and lower requirement for straight pipeline DN 6 to DN2000 covers a wide range of pipe size A variety of liners and electrodes are available to satisfy different flow characteristic Programmable low frequency square wave field excitation improving measurement stability and reducing power consumption Implementing 16 bits MCU providing high integration and accuracy Full digital processing high noise resistance and reliable measurement Flow measurement range up to 1500 1 High definition LCD display with backl2. SIG1 Signal 1 Connecting to white coax wire ofSTT3200 cable SIG2 Signal 2 Connecting to black coax wire of STT3200 cable DS1 Signal 1 shield drive Connecting to inner shield layer of white coax wire of STT3200 cable DS2 Signal 2 shield drive Connecting to inner shield layer of black coax wire of STT3200 cable SIG GND Signal ground Connecting to Ex shield of STT3200 cable EXT Coil 1 Connecting to red cable EXT Coil 2 Connecting to yellow cable 8 3 2 Connection of STT3200 Cable 100 mm 30 Red Ex shield Sleeved ground wire STT3200 Schematic Diag for Cable Preparation Fig 13 Schematic Diag for STT3200 Cable Preparation 26 8 4 Output Signal Wiring The dip switch SW1 is set to ON to supply 12V power to pulse output A 1KO resister is connected to the 12V power to provide a pull up If external power is used turn the switch to OFF p Fig 14 a Wiring of current output Fig 14 b Example of electromagnetic counter connection Fig 14 c Example of electrical counter connection 0000 Fig 14 d Digital Output Direct Connection 27 Internal Circuit PCOM Fig 14 e Connection with photo coupler e g PLC Internal Fig 14 f Connection with relay e g PLC Generally the intermediate relay needs 12V or 24V power supply E D is a surge absorbing diode which is usually embedded in the relay If not an external one is necessary 28 Self diagnostic a
3. 4 5 6 3 15 Pulse Fact Equivalent pulse Unit is referred to one pulse for value of flow The range of pulse equivalent can be chosen Pulse Pulse Equivale Flow Equivale Flow nt nt 0 001L cp 0 001m cp 0 01L cp 0 01m cp 6 a 1 0L cp 1 0m cp Under the same flow the smaller pulse the higher frequency output and the smaller error will be The highest pulse output is 100cp s and mechanism electromagnetic counter can get 25 frequency s 6 3 16Freque Max Frequency output range is as the upper limit of flow measure just the percent flow 100 Frequency output upper limit can be selected between 1 5000Hz The state of empty pipe can be detected with the function of converter In the case of Empty Pipe Alarm if the pipe was empty the signals of analog output and digital output would be zero and displayed flow would be zero too 6 3 17Mtsnsr Ena The state of empty pipe can be detected with the function of converter In the case of Empty Pipe Alarm if the pipe was empty the signals of analog output and digital output would be zero and displayed flow would be zero too 6 3 18Mtsnsr Trip When the pipe is full of liquid whether flowing or not the parameter of Mtsnsr could be modified more easily The parameter displayed upper line is real MTP and the parameter displayed bellow is the Mtsnsr trip that should be set When setting Mtsnsr trip you could be according to the real MTP the value that should be set is u
4. 4 for deferent operators in secret and 2 are fixed passwords for system operation 6 2 3 Functions select menu Push Compound Enter keys to the functions select menu push Up or Down keys to select there are two functions Code Functions Notes 1 Parameters Select this function It can enter the Set picture of parameter 2 Clr Total Rec Select this function It can be gross reset operation Rec the factor s modif Record 6 2 3 1 Parameters Set Press Compound Enter key it displays Parameters Set function Input password Press Compound Enter key it getting to Parameters Setting status 6 2 3 2 Clr Total Rec To push Compound Enter keys getting to the select of parameter then push Up key to Clr Total Rec input the passwords When the passwords becomes 00000 this function is done the gross is 0 in the instrument 6 2 3 3 Fact Modif Rec To push Compound Enter keys getting to the select of parameter then push Up key to Fact Modif Rec Detail consult the AppendixFive 6 2 4 Setting Parameters in Menu There are 54 parameters of L MagB user can set every parameter The List of Parameters is shown below Setting Parameters in Menu ens way Onde Range words Wa EX e m m m3 s 0 99999 Flow Rspns Plus Reverse 0 9999 Flow Cutoff Cutoff Ena 0 599 99 Enable Disable 0 001m 1m 0 001L 1L Enable Disa
5. Enter key Press it to come into the picture of select function Under the measure adjust of the LCD contract is used Compound key Up key or Compound key Down key for several seconds b Function keys for parameters setting Down key Subtract 1 from the number at cursor area Up key Plus 1 to the number at cursor area Compound key Down key Cursor turns left Compound key Up key Cursor turns right Enter key In Out submenu Enter key Press for two seconds under any state and will return to automate measure way Note 1 When use Compound key you should press Compound key and Up or Down both 2 It will return to the measure way automatically after 3 minutes when under the parameter setting way 3 Direct select of zero correction about the flow you can move the cursor to the left or and use Down or Up to switch 6 2 2 Function keys for setting parameters To set or correct working parameters the converter should be running in parameters setting way instead of measuring status In measuring status push Compound Enter keys getting to the select of parameter and transfer password 0000 and then correct the password with one of the new passwords that are provided by manufacturer Finally push the Compound Enter keys to work in Parameters Setting Way There are 6 Passwords in design and among them
6. Negligible Small Signals of flow volume velocity and percentage out of displaying and outputting them Sometimes user can delete output of current output signal and frequency pulse output signal only to have flow velocity and percentage being displayed 6 3 11 Total Unit Converter display is counter with 9 bits and the max is 999999999 Integrator units are L m liter stere Flow integrator value 0 001L 0 010L 0 100L 1 000L 0 001m 0 010m 0 100m3 1 000m 6 3 12 SegmaN Ena When SegmaN Ena is enable if the flow flows the sensor will export pulse and current When itis disable the sensor will export pulse as 0 and current as 0 4mA or OmA for the flow flows reversals 6 3 13 Output currents Output current types can be chosen by users as 1 10mA or 4 20mA practically 6 3 14 Pulse Type Two kinds of Pulse Outputs are can be chosen Frequency Output and Pulse Output Frequency Output is continuous square waveform and Pulse output is a serial wave of square wave Frequency output is mainly used for instant flow and total integrated flow in short time measurement Frequency output can be chosen in equivalent frequency unit and volume of integrated flow can be displayed Frequency Output can be used in long time measurement for total integrated flow with volume units Frequency output and pulse output are usually from OC gates so that DC power supplies and load resistors have to be required See Part
7. tensile 1 80 C 120 C special strength good wear resistance order required 2 Able to resist the corrosion of generally low 2 General water polluted concentration acid alkali and salt unable to resist water weak wear ability that of the oxidative medium mud and ore pulp eml wear resistance ten times of the natural 1 lt 80 C rubber s 2 Middle and strong wear 2 Poor abrasion resistance of acid and alkali ability ore pulp coal pulp 3 Not able to work with water mixed with organic i mud etc solvent polychloropre e rubber polyurethane rubber Selection of electrode material Materials of electrode Corrosion resistance Mo containing stainless Able to work with medium with weak corrosivity such as steel industrial water living water polluted water etc widely used OCr18Ni12Mo2Ti in industries like oil chemical urea vinylon etc Silos siendo Used for medium without corrosivity or with weak wear ability wolfram carbide Good corrosion resistance of different concentration of hydrochloric acid under boiling point resist the corrosion of non oxidizing acid alkali non oxidizing salt solution such as sulfuric acid phosphoric acid organic acid etc Resist the corrosion of oxidizing acid such as nitric acid mixed acid the mixture of chromic acid and sulfuric acid Hastelloy C HC oxidizing salt like Fe Cu or other oxidants such as hypochlorite solution above ordinary temperature a
8. than that of the process pipe under which condition the flow rate in the measuring pipe of the flowmeter can be properly decreased and the abrasion of electrode and liner caused by the particle can be alleviated 3 If there are sediment in the process pipe a flow rate range of 1 3m s is recommended If the practical flow rate is too little the nominal diameter of the instrument is better smaller than that of the process pipe in order to properly increase the flow rate of the fluid in the flowmeter to avoid the effect on the accuracy caused by the sediment 4 If the flow rate is too little yet a high precision measurement is required a sensor smaller than the nominal diameter can increase the flow rate to ensure high precision In the above 2 3 4 conditions a reducing pipe should be jointed to both the upstream and downstream of the flowmeter The centre taper angle should be no more than 15 and there should be a straight pipe at least 5 times of the the process pipe jointed to the reducing pipe To help making lectotype several flow values which corresponding to the certain typical flow rate are listed in the table below any flow value could be quickly work out based on the corresponding flow rate If a flow value is known as Q m h according to the relevant nominal diameter check out the corresponding flow value Q1 with a flow rate of 1m s then the flow rate can be work out through a formula as V Q Q m s Diameter m 15 20 25 4
9. 0 50 65 80 100 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600 1800 2000 2200 2400 2600 0 01 Min 0 0064 0 0113 0 0177 0 452 0 0707 0 1195 0 1810 0 2827 0 6362 1 1310 1 7671 2 5447 3 4636 4 5239 5 7256 7 0686 10 1788 13 8544 18 0956 22 9022 28 2743 40 71 50 55 4177 72 3823 91 6088 113 0973 136 8478 162 8602 191 1343 comparison table of flow and flowrate 1 2 3 4 5 li Max 0 6362 1 1310 1 7671 4 5239 7 0686 11 9459 18 0956 28 2743 63 6173 113 0973 176 7146 254 4690 346 3606 452 3893 572 5553 706 8583 1017 8760 1017 8760 1385 4424 1809 5574 2290 2210 2827 4334 4071 5041 5541 7694 7238 2295 9160 8842 11309 7336 16286 0163 19113 4268 1 2723 2 2619 3 5343 9 0478 14 1372 23 8918 36 1911 56 5487 127 2345 226 1947 353 4292 508 9380 692 7212 904 7787 1145 1105 1413 7167 2035 7520 2770 8847 3619 1147 4580 4421 5654 8668 8143 0082 11083 5389 14476 4589 18321 7684 22619 4671 27369 5552 32572 0326 38226 8536 1 9085 3 3929 5 3014 13 5717 21 2058 35 8377 54 2867 84 8230 190 8518 339 2920 530 1438 763 4070 1039 0818 1357 1680 1717 6658 2120 5750 3053 6281 4156 3271 5428 6721 6870 6631 8482 3002 12214 5122 16625 3083 21714 6884 27482 6525 33929 2007 41054 3328 48858 0490 57340 2804 2 5447 4 5239 7 0686 18 0956 28 2743 47 7836 72 3823 113 0973 254 4690 452 3893 706 8583 1017 8760 1385 4424 1809 557
10. 4 2290 2210 2827 4334 4071 5041 554 1 7694 7238 2295 9160 8842 11309 7336 16286 0163 22167 0778 28952 9179 36643 5367 45238 9342 54739 1104 65144 0653 76453 7072 3 1809 5 6549 8 8357 22 6195 35 3429 59 7295 90 4779 141 3717 318 0863 565 4867 883 5729 1272 3450 1731 8030 2261 9467 2962 7763 3534 2917 5089 3801 6927 2118 9047 7868 11451 1052 14137 1669 20357 5204 27708 8472 36191 1474 45804 4209 56548 6678 68423 8880 81430 0816 95567 1340 9 5426 16 9646 26 5072 67 8584 106 0288 179 1886 271 4336 424 1150 954 2588 1696 4600 2650 7188 3817 0351 5195 4089 6785 8401 8588 3289 10602 8752 15268 1403 20781 6354 27143 3605 34353 3157 42411 5008 61072 5612 83126 5416 108573 4421 137413 2627 169646 0033 205217 6640 244290 2448 286701 4020 Selection of liner material 1 It is a plastic material with the stablest chemical properties resist the corrosion of boiling hydrochloric acid sulfuric acid nitric acid aqua 1 100 C 150 C special regia concentrated alkali and many kinds of order required polytetrafluoro organic solvent unable to resist the corrosion of 2 Strong corrosive ethylene chlorine trifluoride high temperature medium like concentrated vanadyltrifluoride high flow rate liquid fluorine acid alkali etc liquid oxygen and ozon 3 Sanitary medium 2 Poor abrasion resistance 3 Poor ability of anti negative pressure 1 Excellent elasticity high degree of
11. C order required 100 C 150 C special The liner material and order required maximum temperature of fluorinated 100 C 150 C special fluid ethylene propylene FEP order required indicationt0 5 flow rate no less than 0 8m s polyvinyl fluoride 80 C 120 C special olychloropree rubber d 2 order required 70 C 70 C 70 C 70 C polyurethane 80 C Electrode type Fixed type DN150 DN2600 Blade type DN300 DN1600 mo containing stainless steel hastelloy B hastelloy C titanium alloy tantalum alloy platinum iridium alloy stainless steel coated wolfram carbide Flange Material carbon steel Grounding flange material stainless steel 1Cr18Ni9Ti Material of signal electrode and grounding electrode Material of inlet protection DN15 DN600 stainless steel 1Cr18Ni9Ti DN15 DN150 remote sensor with rubber IP65 IP68 special order or polyurethane liner required Shell protection DN200 DN2600 remote sensor with IP68 5 10m underwater rubber or polyurethane liner other sensor and all kinds of converter 465 Generally the spacing between converter and sensor is no longer than Spacing remote type 100 meters special order will be required when it is longer than 100 m General Specification of Converter Power supply AC 85 265V 45 63Hz x20W DC 11 40V Converter display and operation four keys are available to set all parameters External handheld or PC can be used to do the configuration H
12. ble 12 Total Unit Select Analog Type Select 2 0 10mA 4 20mA Pulse Type Select 2 Fregue Pulse 0 001m 1m 1 17 FrequeMax Select 2 1 5999 HZ NIN N N 0 99999 Finished YM Lineary CRC1 Product number Type1 2 3 0 0000 5 9999 EET NI 20 Cu O23 24 25 Er C NI 28 290 80 18 20 22 23 24 25 26 27 28 29 30 33 34 35 36 38 39 0 2 3 4 5 Enable Disable Set Velocity 0 0000 1 9999 Set Velocity wo N Pass Word 1 coer 00000 99999 correct 47 Pass Word 2 is 5 00000 99999 correct Pass Word 3 User 00000 99999 correct Pass Word 4 SeT 00000 99999 correct 53 MeterCode1 Factoryset 6 Finished Y M 4 5 MeterCode 2 Factory set 6 Product Serial No Parameters of converters can decide the running status process and output ways as well as state of output Correct option and setting of C2 4 s 4 4 4 4 A O 15 parameters can keep the converters running optimally and get higher accuracies of output bother in display and in measurement There are 6 grades of passwords for setting parameters function Grades 1 to grade 5 of passwords are for users and grade 6 of password is for manufacturer Users can reset their passwords of grades 1 4 in grade 5 Users can check converters parameters in any grade of password However if users want to change parameters pf converters deferent grad
13. e of parameters have to be used by the users Grade 1 of password set by manufacturer as 00521 users can only read parameter Grade 2 of password set by manufacturer as 03210 users can change 1 24 parameters Grade 3 of password set by manufacturer as 06108 users can change 1 25parameters Grade 4 of password set by manufacturer as 07206 users can change 1 38parameters Grade 5 of password Fixed users can change 1 52 parameters Password Grade 5 can be set by skilled users Grade 4 is mainly used for resetting total volume in password Grades 1 3 can be set by any one who can be chosen by users 6 3 Details Parameters 6 3 1 Language There are 2 languages for L_MagB converter operation They can be set by users according to the users needs 6 3 2 Comm Addres It means this instrument s address when communicates with many and has 01 99 holding the 0 6 3 3 Baud Rate 600 1200 2400 4800 9600 19200 baud rate 6 3 4 Snsr Size L MagB converters can be equipped with some deferent sensors that have deferent diameter of measuring pipes The pipes in deferent diameters from 3mm to 3000mm can be chosen in relative table 6 3 5 Flow unit The flow unit can choose form the parameters L s L m L h m s m m m h and the user can choose the proper unit according to the technological requirement and using habit 6 2 6 Flow Range Flow range means upper limit value and lower limit value is set O automatically So i
14. flow velocity of the fluid will be inducted on the electrodes The signal is amplified and treated by the transmitter to realize various display functions 2 2 Converter Circuit Schematic The converters supplies a stable exciting current to the coil in the sensor of electronetic flowmeters to get B constant and amplifies the electromotive force and convert it into standard signals of current or frequency so that the signals can be used for displaying controlling and processing The schematic of converter circuit is shown in Fig 2 1 NS v ifier 8 em circuit 85 260 4 Sui tchi 45 608 LCD Displa 4 20m or 0 10nA 1 5000Hz Frequency or Pulse Output Pulse Output O Gato i tatus ommuni cat ton Fig 1 Schematic of converter circuit Product Classification Electromagnetic flowmeter is composed of sensor and converter It has two forms compact type and remote type The remote type also needs a special double layer shielded cable to connect the converter and the sensor There are seven kinds of electrode materials and four kinds of lining materials available for sensor Technical Specifications Peak flow rate Accuracy refer to accuracy curve l DN15 DN600 Nominal pressure DN200 DN1000 DN700 DN3000 sensor 25 C 60 C Ambient temperature A compact flowmeter and converter 10 C 60 C liner material Remote type Compact type 100 C 150 C cial polytetrafluoroethylene pe 70
15. gh byte and low byte can change forthcoming and reverse total value and be used to maintenance and instead User use 5 byte code to enter and can modify the positive accumulating volume gt Usually it is unsuitable to exceed the maximum the counter set 999999999 6 3 28 RevTotal Lo hi User use 5 byte code to enter and can modify the negative accumulating volume 5 Usually it is unsuitable to exceed the minimum the counter set 999999999 6 3 29 PlsntL mtEn For paper pulp slurry and other serosity the flow measure will have cuspidal disturb because the solid grain friction or concussion the measure electrode L MagB converters use variation restrain arithmetic to conquer the disturbing by designing three parameters to select disturb character Set it enable start variation restrain arithmetic set it disable close variation restrain arithmetic 6 3 30PIsntL mtVI This coefficient can disturb the variation of cuspidal disturb and calculate as percent of flow velocity thus ten grades 0 010m s 0 020m s 0030m s 0 050m s 0 080m s 0 100m s 0 200m s 0 300m s 0 500m s 0 800m s and the smaller percent the higher delicacy of cuspidal restrain Note when using it must test for select by the fact and sometimes it is not the higher delicacy is good 6 3 31 PlsntDelay This coefficient can select the width of time of restrain cuspidal disturb and the unit is ms If the duration is shorter than flow change in s
16. igh resolution LCD display with backlight empty pipe detection and self diagnostic function are equipped in the converter Digital communication RS485 RS232 MODBUS REMOTE Output Signals Current output fully isolated 4 20mA 0 10mA load resistance 0 10mA 0 1 5KQ 4 20mA 0 7500 Frequency output bidirectional flow output Frequency output is proportional to the flow percentage of the full range The converter provides fully isolated transistor open collector frequency output ranged from 1 to 5000 Hz The external DC power supply should not exceed 35V and maximum collector current is 250mA Pulse output bidirectional flow output The converter can output up to 5000cp s pulse series which is dedicated to external totalization Pulse factor is defined as volume or mass per pulse It can be set to 0 001L p 0 01L p 0 1L p 1L p 2L p 5L p 10L p 100L p 1m p 10 m p 100 m p or 1000 m p Pulse width is selectable from auto 10ms 20ms 50ms 100ms 150ms 200ms 250ms 300ms 350ms and 400ms Photo coupler isolated transistor open collector circuit is used for pulse output The external DC power supply should not exceed 35V and maximum collector current is 250mA Flow direction indication The converter is capable of measuring both forward and reverse flow and recognizing its direction The converter outputs OV low level for forward flow while 12V high level for reverse flow Alarm output Two channels of photo couple
17. ight RS485 or RS232 interface supports digital communication Intelligent empty pipe detection and electrodes resistance measurement diagnosing empty pipe and electrodes contamination accurately SMD component and surface mount technology SMT are implemented to improve the reliability Wa Wave OLONE Electromagnetic flowmeter can be used to measure the volume flow of conductive fluid in a closed pipeline t is widely applied in the flow measurement and control in the fields of chemical and petroleum industry metallurgy industry water and waste water agriculture and irrigation paper making food and beverage industry and pharmaceutical industry 1 3 Ambient and Working Conditions Ambient temperature sensor 25 C to 60 C converter 25 C to 60 C Relative humidity 5 to 90 Fluid conductivity 2 5m S cm Maximum fluid temperature Compact type 60 C Remote type Teflon 150 C Neoprene 80 C 120 C Polyurethane 70 C Working Principles 2 1 Measuring Principles The measuring principle of electromagnetic flowmeter is based on the electromagnetic induction law of Farady The sensor is mainly composed of measuring tube with isolate lining a pair of electrodes installed by penetration of the measuring tube wall a pair of coils and iron core to produce working magnetic field When the conductive fluid flows through the measuring tube of the sensor the voltage signal in direct proportion to the average
18. liner However it is not applicable to the sensor with polytetrafluoroethylene liner Inlet protection flange Convertor Operation Menu and Parameter Setting 6 1 Keypad and Displa Flow Volume Unit Alarm Type SYS Time Flow Velocity Ratio of Emptiness Percentage Y N D Hour Mir Second Forward amp Reverse Integrated Volumes Difference of Forward amp Reverse Integrated Volumes Enter With ALT Key to form Enter and OK UP Plus 1 Page UP Wih OK key to confirm Riaht Move Down Minus 1 Page Down With OK Key to Confirm Left Move Compound Key Fig 5 a Remote type key and display Alarm 16 570 Flow Volume Unit indicator Lo X1aY Hr limit 00000001 3 5m EN Flow Velocity Ratio of Emptiness Percentage Forward amp Reverse Integrated Volumes Dfference of Forward amp Reverse Intearated Enter UP Plus 1 Page UP Down Minus 1 Page Down Compound Key Fig 5 b Compact type key and display B 4 key parameters and setting When electrify the instrument comes into measure way automatically and under this way it can do all the functions and display data Under the parameter setting way user can set the parameter by the four keys 5 2 1 Keys function a Keys function in self testing way Down key Selecting displayed data on lower line in turn Up key Selecting displayed data on higher line in turn Compound key Enter key Come into parameter setting
19. m Copper Earth 400 Ear th femi lt Noa netallic pipes no grounding electrode sensors Noa aetallic pipes grounding electrode sensors installed Connerting Wine i 4mm Copper Earth zn besistanetet10Q 400 With the pipeline cathodic protection 23 8 2 Converter Terminals and Definition Terminal blocks and marks are shown in Fig 8 and Fig 9 ON 9S9S 9S99SS90S sss Isssosos Fig 8 Remote Type Terminals and Marks The definition of terminals and their marks for remote type converter is given as below DS1 Shield drive 1 Signal input 1 DS2 IOUT PDIR Flowdirection indicator B RS485 communicationB 220V 24V input 220V 24V input The dip switch SW1 is set to ON to supply 12V power to pulse output If 24 external power is used turn the switch to OFF AH T Te 1 COMSIGISGNDSG2 iejejoje o olo o L2 N P AL COMEXT EXT a D Fig 9 Compact Type Terminals and Marks The definition of terminals and their marks for compact type converter is given as below COM Alarm flow direction pulse output FDIR Flow direction indicator High alarm output Input contact Input contact Frequency pulse output Current pulse output Current output 220V 24V input L2 220V 24V input 25 8 3 Remote type Wiring 8 3 1 Terminal Block in Sensor Fig 11 Marks of Terminal Block
20. nd seawater Hastelloy B HB Resist the corrosion of seawater all kinds of chloride hypochlorite oxidizing acid include fuming nitric acid organic acid alkali etc unable to resist the corrosion of purer Titanium Ti reducing acid like sulfuric acid and hydrochloric acid The corrosivity of alpha hydroxy acids will be substantially decreased if there are oxidants such as nitric acid Fe Cu etc in it The corrosion resistance of tantalum is as good as glass Tantalum Ta Except hydrofluoric acid fuming nitric acid and alkali it is able to resist the corrosion of almost any other chemical media Almost be able to work with any chemical medium other than aqua regia and ammonium salt Platinum iridium alloy As there is a great variety of medium and their corrosivity can be affected by complexity factors such as temperature concentration flow rate etc the above two tables are just for reference Customers should make choices according to the practical situations if necessary corrosion resistance experiment like hanging sheet experiment of simulation materials should be performed Selection of liner protection flange and grounding flange Type of flange Applicability Applicable to non conductive pipeline like Grounding flange plastic pipeline However it is not required for the sensor with polytetrafluoroethylene liner Applied when the medium has strong wear ability often used with polyurethane
21. nd Troubleshooting The converter is made by surface mount technology and is not repairable for user Do not open the converter case The self diagnosis function of the converter is capable of displaying alarm information except power supply or hardware failures A symbol is displayed on the right corner of LCD top line and malfunction information can be read from the bottom line by pressing DOWN key User may check the flowmeter according to the alarm information Some examples of alarms are given below Coil Alm Elctrd Alm EpPipe Alm Low Alarm High Alarm Troubleshooting information is given below 9 1 No display a Check the connection of power supply b Check fuse c Check the voltage of power supply d Check if the LCD contrast can be adjusted Adjust it if possible e Return to base if a to d are OK 9 2 Coil Alarm a Check if terminal EXT and EXT are open b Check if coil resistance is less than 1500 C Replace converter if a and b are OK 9 3 Empty Pipe Alarm and Electrodes Alarm a Check ifthe sensor pipe is filled with fluid b Check the connection of signal wiring c Connect the terminal SIG1 SIG2 and SIG GND If the alarm display disappears it is confirmed the converter is normal The alarm may be caused by the bubble in the fluid d Forelectrodes alarm measure the resistance between two electrodes with a multimeter The read should be between 3 to 50kO Otherwise the electrodes are contaminated o
22. ome time L_MagB will think it is cuspidal disturb and if it is longer L MagB will think it is natural It also needs to select parameter in fact 6 3 32User s password 1 4 Users can use 5 grades of passwords to correct these passwords 6 3 33 Analog Zero When the converters are made in the factory output current has been calibrated to zero scale that is accurate OmA or 4mA output 6 3 34 Anlg Range When the converters is made in the factory output current have been calibrated to full scale that is accurate 10mA or 20mA output 6 3 35Meter Fact This fact is the special one of sensor made factory and the factory use this fact to unite L_MagB electromagnetic flowmeters converters to make sure all the instruments can interchange by 0 1 6 3 36 MeterCode 1 and 2 Converter code records the date of manufacturing and serial number of converter 20 Installation KA Appropriate Overhang Av aw ini Strong Sunshine Prevention e o X Keeping Away from Leaking Keeping Far Away from Fire The correct installation flowmeter 21 Electrode axial keeps horizontal Reasonable Support Measurement for the Precipitable Maintenance and Clean up Not Installed in Front of the Inlet of Pump Strong Shake Avoidance 22 Wiring 8 1 Grounding Connerting Wine 4mm Copper Grourid Resistance lt 100 Earth 400 Metal Pipes gt 4mm Copper f Grourtd Resistance 100 gt 4m
23. r covered 9 4 High Alarm Increase the flow range 9 5Low Alarm Reduce the flow range 9 6 Inaccurate Measurement a Check ifthe sensor pipe is filled with the fluid to be measured 29 b Check the wiring c Check if the sensor factor and flow zero are the same as those on the calibration sheet Packing The package includes The electromagnetic flowmeter ordered Instruction Manual Transportation and Storage To prevent the flowmeter from damage in the transportation the package should be keptin unopened status before reaching installation site The storage room should be satisfied with the following conditions a Rain proof humidity proof b Strong Vibration and Shake Avoidance c Temperature between 20 to 60 C relative humidity less than 80 Operation Before operation the following inspection should be done to check if a There is any damage caused by transportation or installation b The power used is same as the label on the flowmeter c The wiring is correct After inspection turn the valve on to fill the pipe up and make sure there is no leakage and the gas inside the pipe is eliminated Switch on the power supply and the flowmeter is ready to use after 10 minutes warm up If there is any problem please refer to the Section 9 for troubleshooting If still not working properly contact the manufacturer immediately 30
24. r isolated open collector circuit are used for alarm signal output There are two alarm outputs high limit alarm and low limit alarm The external DC power supply should not exceed 35V and maximum collector current is 250mA Damping constant Damping time is selectable from 0 2 to 100s Drawings and Dimensions DESEM m oe ee ws 200 vs tes 295 225 8 200 1 80 3 0 20 108 15 200 50 90 320 29 w 2 200 165 200 330 260 1 3 MW 250 185 29 2 5809 2045 2005 2175 2 05 2089 259 72999 2265 2265 2595 2228 2014 2015 _ 72299 2475 2075 2008 2505 era EE 72405 2085 2005 25 5 2745 2014 395 Lectotype principle The measured fluid must be conducting liquid or slurry with a conductibility no less than 5ys cm avoid fluid with too much ferromagnetic substance or bubble The pressure rating liner material electrode material and instrument structure should be chosen based on the characteristics of the fluid Selection of nominal diameter 1 As electromagnetic flowmeter has a high rangeability of 1500 1 the selection of nominal diameter is the same as that of process pipe 2 If there are solid particle in the measured medium a flow rate range of 1 3m s is recommended If the practical flow rate is excessive yet inconvenient to adjust the nominal diameter of the instrument is better larger
25. sually three to five times of real MTP 6 3 19 Alm Hi Ena Users can choose Enable or Disable 6 3 20 Alm Hi Val The parameter of upper limit alarm is percentage of flow range and can be set in the way of setting one numerical value between 0 199 9 When the value of flow percentage is larger than the value of setting value the converter outputs the alarm signal 6 3 21Alm Lo Val The same as upper limit alarm 6 3 22 Sys Alm Ena Selecting Enable will have the function and selecting Disable will cancel the function 6 3 23 Clr Sum Key User use more than 3 byte code to enter Then set this password in Clr Total Rec 6 3 24 Snsr Code It is referred to the produced date of sensor and the serial number of product that can keep the sensors coefficient right and accurate 6 3 25 Sensor Fact Sensor Coefficient is printed on the Label of the sensor when it is made in factory The sensor coefficient has to be set into Sensor Coefficient Parameter when it runs with converter 6 3 26 Field Type L MagB affords three exciting frequency types 1 16 frequency type 1 1 20frequency type 2 1 25 frequency type 3 The small bore one should use 1 16 frequency and large bore one should use 1 20 or 1 25 frequency When using please select type 1 first if the zero of velocity is too high select the type 2 or type 3 Note Demarcate on which exciting type working on it only 6 3 27 FwdTotal Lo hi Positive total volume hi
26. t makes the range and makes the relation of percent display frequency output and current output with flow percent display flow measure measure range 100 frequency output flow measure measure range frequency full current output flow measure measure range current full base point pulse output will not affect 6 3 7 Flow Rspns It means time of filter measure value The long one can enhance the stability of flow display and output digital and fits for gross add up of pulse flow the short one means fast respond rate and fits for production control It is set by select 6 3 8 Flow Direct If users think the direct and design are differ just change the direct parameter is OK but not change exciting or signal 6 3 9 Flow zero Make sure the sensor is full of flow and the flow is stillness Flow zero is shown as velocity of flow mm s Converter s zero flow correction displays like this Upper small words FS means measure value of Zero Lower large words correction value of zero When FS is not 0 make FS 0 Note if change the value on next line and FS increases please change the to correct FS to zero Flow zero is the compound value of the sensor and should be recorded in sensor list and band The unit will be mm s and the sign will be opposite with correction value 6 3 10 Flow cutoff Flow cutoff is set in percentage of Upper Limit Range of flow and users can delete all
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